Question

# Calculate Re for 1.47m tall person swimming in water at 0.2ms^-1. Viscosity of water is 1.0cp=...

Calculate Re for 1.47m tall person swimming in water at 0.2ms^-1. Viscosity of water is 1.0cp= 1x10^-3

Calculate Re for a 1.35m tall person swimming in butter at 0.03ms^-1. The density of the butter is 1.3x10^3kgm^-3

Calculate the Re for a 1.0µm of a bacteria swimming in water at 19.0µm^-1

We know Reynolds number,   where is the density of fluid , L is the linear dimension of the object, v is the velocity of the fluid with respect to the object and is the viscosity of the fluid.

(a) Here L = hight of the man = 1.47 m , v = 0.2 m/s , viscosity of water = 1.0 cp = , density of water

So R the Reynolds number is

(b) Here L = 1.35 m , v = 0.03 m/s , Density of butter

We know viscosity of butter

So the Reynolds number in swimming in butter is 0.2106.

(c) length of the bacteria ,

velocity ,

So the Reynolds number when a bacteria swims is

#### Earn Coins

Coins can be redeemed for fabulous gifts.

Similar Homework Help Questions
• ### density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217...

density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217 250,000 eanut butter Paper Homework 3 Viscosity and Flow. Learning Objectives: 1. Gain a feel for the Reynolds number for typical situations. 2. Determine type of flow from the Reynolds number. Calculate the Reynolds number, Re - (2rpv)/ n, for the following situations and decide whether the flow of fluid around them is laminar or turbulent. Then calculate the frag force using the appropriate...

• ### 1. What is the Reynolds number of a bacterium of diameter 1.2 micrometers, swimming at 17...

1. What is the Reynolds number of a bacterium of diameter 1.2 micrometers, swimming at 17 micrometers per second? Water has viscosity 8.9x 10PaS and density 1000 kg/m'. Is it laminar, transitional or turbulent? (4 points)

• ### density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217...

density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217 250,000 eanut butter [4] For a blue whale, a fast speed is 13.9 m/s and the radius for their cross-section is 1.9 meters. Calculate the Reynolds number.

• ### 1) How to calculate the density and viscosity of gas mixtures 2) how to calculate density...

1) How to calculate the density and viscosity of gas mixtures 2) how to calculate density and viscosity for a typical gaseous system in Bioprocesses, set the specifications

• ### (a) Calculate time required for a virus particle that is 50 nm (50x10-9 m) in diameter...

(a) Calculate time required for a virus particle that is 50 nm (50x10-9 m) in diameter with a density of 1.03 g cm-3 suspended in water with a density of 1.0 g cm-3 to settle out of a water column that is 3 m deep. Assume the dynamic viscosity is 1x10-3 kg m-1 s-1. (b) What is the time required if the virus particle was attached to an Al(OH)3 floc that is 0.1 mm in diameter with a density of...

• ### I would like a step by step solution please. Calculate the terminal velocity of two steel...

I would like a step by step solution please. Calculate the terminal velocity of two steel balls falling through water. The diameters of the two balls are a) cm and b)10cm. Also calculate the Reynolds number for the 10cm sphere. The forces acting on each sphere are gravity, buoyancy and drag Setting up the force equation mg At terminal velocity, the acceleration is zero, as is the net force. Vpsg-Vpwg- 0 1.003 x 10-3 Pa s for water at 20°C...

• ### density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217...

density (kg/m) viscosity (cp mPa s) VISCOsI water 20°C air 20°C 1000 1.204 1090 1.03 02217 250,000 eanut butter [5] Many microscopic organisms and small multi-cell creatures who live (and move) in water move by using flagella or shorter cilia moving in a wavelike fashion to push against the water. A large paramecium can have a radius of 0.5 mm. and can move at speeds up to 1mm/s. Calculate the Reynolds number for these "wee beasties"

• ### Calculate the Reynolds number, Re- (2rpv)/ n, for the following situations and decide whether the flow...

Calculate the Reynolds number, Re- (2rpv)/ n, for the following situations and decide whether the flow of fluid around them is laminar or turbulent. Then calculate the frag force using the appropriate formula. For the radius, use r 2(Area/perimeter) which, for a circle, gives the radius. Densities and viscosities are in the table on page 2. Also, to keep things uniform, we will use the boundaries for laminar and turbulent flow from Engineer's Toolbox, also on pg. 2 [1] A...

• ### Calculate the Reynolds number, Re = (2rρv)/ η , for the following situations and decide whether...

Calculate the Reynolds number, Re = (2rρv)/ η , for the following situations and decide whether the flow of fluid around them is laminar or turbulent. Then calculate the frag force using the appropriate formula. For the radius, use r = 2(Area/perimeter) which, for a circle, gives the radius. Densities and viscosities are in the table on page 2. Also, to keep things uniform, we will use the boundaries for laminar and turbulent flow from Engineer's Toolbox, also on pg....

• ### Water (density 998 kg/m', absolute viscosity 1.12x10 Ns/m2) is pumped from a lake into a reservoir at a rate of 0.7 m/s. The water flows through a re-entrant opening, a valve, and a sharp-edge...

Water (density 998 kg/m', absolute viscosity 1.12x10 Ns/m2) is pumped from a lake into a reservoir at a rate of 0.7 m/s. The water flows through a re-entrant opening, a valve, and a sharp-edged exit, which have loss coefficients of 0.8, 10, and 1, respectively. The pipe has an absolute roughness of 1x104m and di of 0.30 m. The pump efficiency is 65%. A) Is the flow in the pipe laminar or turbulent? (2 points) B) What is the power...